Now, it emerges that the Southern giants have refused a Chelsea offer for the Frenchman, amounting to €35 million, up from the €25m they'd offered the previous month.

Koulibaly's agent, Bruno Satin, recently met with Napoli to try to reach an agreement over his contract, but the two sides couldn't even reach a preliminary agreement. Either Aurelio De Laurentiis cranks up Koulibaly's salary, or the fear is that he may leave.